Twitter is worth $8 billion less than it was in its earning report on Wednesday. CBS News contributor and analyst Mellody Hobson joins the "CBS This Morning" co-hosts to explain the 24 percent decline.

Leading into the the Olympics in Sochi, the U.S. two-man bobsled, luge and skeleton teams worked with world-renowned engineers to overhaul their equipment, hoping the high-tech tune ups will help snap long losing streaks. Danielle Elliot reports.

Nick Dietz compiles some of the week's best viral videos, including a 15-month-old experiencing rain for the first time, personal injury lawyer Jamie Casino's epic Super Bowl XLVIII commercial and a beagle trying hard to get a water bottle. Plus, 4-year-old Jackson gets emotional listening to A Great Big World and Christina Aguilera's song “Say Something.”

More than 350,000 homes and businesses in Pennsylvania and Maryland are still without electricity two days after freezing rain and sleet toppled trees across the region. CBS News' Terrell Brown reports from Jenkintown, Pa.

Just one week after House Speaker John Boehner unveiled his road map for immigration reform, he announced it was in trouble because his Republican members do not trust President Obama. CBS News Congressional correspondent Nancy Cordes reports.

Some much needed snow and rain is on its way to the West Coast. Also, another storm is brewing for the Midwest and North East this weekend. WBBM meteorologist Megan Glaros tracks the latest on the weekend's weather.